μαρτυρέω
martyréō
mar-too-reh'-o
from μάρτυς; to be a witness, i.e. testify (literally or figuratively).

KJV translates as: charge, give (evidence), bear record, have (obtain, of) good (honest) report, be well reported of, testify, give (have) testimony, (be, bear, give, obtain) witness